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Category:   Application (Generic)  >   Tcl/Tk Vendors:   tcl.sourceforge.net
(Red Hat Issues Fix) Tcl/Tk Buffer Overflow in Processing GIF Files Lets Users Execute Arbitrary Code
SecurityTracker Alert ID:  1019479
SecurityTracker URL:  http://securitytracker.com/id/1019479
CVE Reference:   CVE-2008-0553   (Links to External Site)
Date:  Feb 22 2008
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 8.5.0 and prior versions
Description:   A vulnerability was reported in Tcl/Tk. A remote user can cause arbitrary code to be executed on the target system.

A remote user can create a specially crafted GIF file that, when processed by the target application using Tcl/Tk, will trigger a buffer overflow and execute arbitrary code on the target system. The code will run with the privileges of the target application.
Impact:   A remote user can create a file that, when processed by the target application, will execute arbitrary code on the target system.
Solution:   Red Hat has released a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2008-0136.html
Vendor URL:  sourceforge.net/project/shownotes.php?release_id=573933&group_id=10894 (Links to External Site)
Cause:   Boundary error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Feb 6 2008 Tcl/Tk Buffer Overflow in Processing GIF Files Lets Users Execute Arbitrary Code


 Source Message Contents
Date:  Thu, 21 Feb 2008 16:23:04 -0500
Subject:  [RHSA-2008:0136-01] Moderate: tk security update


-----BEGIN PGP SIGNED MESSAGE-----
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: tk security update
Advisory ID:       RHSA-2008:0136-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2008-0136.html
Issue date:        2008-02-21
CVE Names:         CVE-2008-0553 CVE-2007-5137 
=====================================================================

1. Summary:

Updated tk packages that fix a security issue are now available for Red Hat
Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

3. Description:

Tk is a graphical toolkit for the Tcl scripting language.

An input validation flaw was discovered in Tk's GIF image handling. A
code-size value read from a GIF image was not properly validated before
being used, leading to a buffer overflow. A specially crafted GIF file
could use this to cause a crash or, potentially, execute code with the
privileges of the application using the Tk graphical toolkit.
(CVE-2008-0553)

A buffer overflow flaw was discovered in Tk's animated GIF image handling.
An animated GIF containing an initial image smaller than subsequent images
could cause a crash or, potentially, execute code with the privileges of
the application using the Tk library. (CVE-2007-5137)

All users are advised to upgrade to these updated packages which contain a
backported patches to resolve these issues.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  

This update is available via Red Hat Network.  Details on how to use 
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

5. Bugs fixed (http://bugzilla.redhat.com/):

290991 - CVE-2007-5137 Tk GIF processing buffer overflow
431518 - CVE-2008-0553 tk: GIF handling buffer overflow

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/tk-8.4.13-5.el5_1.1.src.rpm

i386:
tk-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm

x86_64:
tk-8.4.13-5.el5_1.1.i386.rpm
tk-8.4.13-5.el5_1.1.x86_64.rpm
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/tk-8.4.13-5.el5_1.1.src.rpm

i386:
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-devel-8.4.13-5.el5_1.1.i386.rpm

x86_64:
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.x86_64.rpm
tk-devel-8.4.13-5.el5_1.1.i386.rpm
tk-devel-8.4.13-5.el5_1.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/tk-8.4.13-5.el5_1.1.src.rpm

i386:
tk-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-devel-8.4.13-5.el5_1.1.i386.rpm

ia64:
tk-8.4.13-5.el5_1.1.ia64.rpm
tk-debuginfo-8.4.13-5.el5_1.1.ia64.rpm
tk-devel-8.4.13-5.el5_1.1.ia64.rpm

ppc:
tk-8.4.13-5.el5_1.1.ppc.rpm
tk-8.4.13-5.el5_1.1.ppc64.rpm
tk-debuginfo-8.4.13-5.el5_1.1.ppc.rpm
tk-debuginfo-8.4.13-5.el5_1.1.ppc64.rpm
tk-devel-8.4.13-5.el5_1.1.ppc.rpm
tk-devel-8.4.13-5.el5_1.1.ppc64.rpm

s390x:
tk-8.4.13-5.el5_1.1.s390.rpm
tk-8.4.13-5.el5_1.1.s390x.rpm
tk-debuginfo-8.4.13-5.el5_1.1.s390.rpm
tk-debuginfo-8.4.13-5.el5_1.1.s390x.rpm
tk-devel-8.4.13-5.el5_1.1.s390.rpm
tk-devel-8.4.13-5.el5_1.1.s390x.rpm

x86_64:
tk-8.4.13-5.el5_1.1.i386.rpm
tk-8.4.13-5.el5_1.1.x86_64.rpm
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.x86_64.rpm
tk-devel-8.4.13-5.el5_1.1.i386.rpm
tk-devel-8.4.13-5.el5_1.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0553
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5137
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2008 Red Hat, Inc.
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